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Viewing: zipWith.js

var baseRest = require('./_baseRest'),
    unzipWith = require('./unzipWith');

/**
 * This method is like `_.zip` except that it accepts `iteratee` to specify
 * how grouped values should be combined. The iteratee is invoked with the
 * elements of each group: (...group).
 *
 * @static
 * @memberOf _
 * @since 3.8.0
 * @category Array
 * @param {...Array} [arrays] The arrays to process.
 * @param {Function} [iteratee=_.identity] The function to combine
 *  grouped values.
 * @returns {Array} Returns the new array of grouped elements.
 * @example
 *
 * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
 *   return a + b + c;
 * });
 * // => [111, 222]
 */
var zipWith = baseRest(function(arrays) {
  var length = arrays.length,
      iteratee = length > 1 ? arrays[length - 1] : undefined;

  iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
  return unzipWith(arrays, iteratee);
});

module.exports = zipWith;

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